Moz Q&A is closed.
After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
Can subdomains hurt your primary domain's SEO?
-
Our primary website https://domain.com has a subdomain https://subDomain.domain.com and on that subdomain we have a jive-hosted community, with a few links to and fro. In GA they are set up as different properties but there are many SEO issues in the jive-hosted site, in which many different people can create content, delete content, comment, etc. There are issues related to how jive structures content, broken links, etc. My question is this: Aside from the SEO issues with the subdomain, can the performance of that subdomain negatively impact the SEO performance and rank of the primary domain? I've heard and read conflicting reports about this and it would be nice to hear from the MOZ community about options to resolve such issues if they exist. Thanks.
-
All of the content that you have on a subdomain and all of the links that the subdomain attracts could have been working to strengthen your root domain.
In Google you are going out to fight the heavyweights. Do you want to do that with a couple light weight platforms or do you want to unite the clans and attack with all that you got. That is the choice that you make by running subdomains.
I moved and redirected my subdomains into folders on the main website a long time ago and the results were great.
-
Under certain circumstances it can harm the rankings and SEO performance of your main site. In terms of low-end technical SEO issues like broken links and stuff, that usually wouldn't be a problem (unless it were creating loads of broken links from the sub-site, to the main site). If you had a more substantial issue like an active penalty (manual GSC notification) or a malware threat (or hacked content) on your subdomain, that could assuredly harm the main site's rankings. Except in extreme circumstances such as these - I wouldn't worry about it too much
Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
Browse Questions
Explore more categories
-
Moz Tools
Chat with the community about the Moz tools.
-
SEO Tactics
Discuss the SEO process with fellow marketers
-
Community
Discuss industry events, jobs, and news!
-
Digital Marketing
Chat about tactics outside of SEO
-
Research & Trends
Dive into research and trends in the search industry.
-
Support
Connect on product support and feature requests.
Related Questions
-
Should I redirect a domain we control but which has been labeled 'toxic' or just shut it down?
Hi Mozzers: We recently launched a site for a client which involved bringing in and redirecting content which formerly had been hosted on different domains. One of these domains still existed and we have yet to bring over the content from it. It has also been flagged as a suspicious/toxic backlink source to our new domain. Would I be wise to redirect this old domain or should I just shut it down? None of the pages seem to have particular equity as link sources. Part of me is asking myself 'Why would we redirect a domain deemed toxic, why not just shut it down.' Thanks in advance, dave
Intermediate & Advanced SEO | | Daaveey0 -
Forwarded vanity domains, suddenly resolving to 404 with appended URL's ending in random 5 characters
We have several vanity domains that forward to various pages on our primary domain.
Intermediate & Advanced SEO | | SS.Digital
e.g. www.vanity.com (301)--> www.mydomain.com/sub-page (200) These forwards have been in place for months or even years and have worked fine. As of yesterday, we have seen the following problem. We have made no changes in the forwarding settings. Now, inconsistently, they sometimes resolve and sometimes they do not. When we load the vanity URL with Chrome Dev Tools (Network Pane) open, it shows the following redirect chains, where xxxxx represents a random 5 character string of lower and upper case letters. (e.g. VGuTD) EXAMPLE:
www.vanity.com (302, Found) -->
www.vanity.com/xxxxx (302, Found) -->
www.vanity.com/xxxxx (302, Found) -->
www.vanity.com/xxxxx/xxxxx (302, Found) -->
www.mydomain.com/sub-page/xxxxx (404, Not Found) This is just one example, the amount of redirects, vary wildly. Sometimes there is only 1 redirect, sometimes there are as many as 5. Sometimes the request will ultimately resolve on the correct mydomain.com/sub-page, but usually it does not (as in the example above). We have cross-checked across every browser, device, private/non-private, cookies cleared, on and off of our network etc... This leads us to believe that it is not at the device or host level. Our Registrar is Godaddy. They have not encountered this issue before, and have no idea what this 5 character string is from. I tend to believe them because per our analytics, we have determined that this problem only started yesterday. Our primary question is, has anybody else encountered this problem either in the last couple days, or at any time in the past? We have come up with a solution that works to alleviate the problem, but to implement it across hundreds of vanity domains will take us an inordinate amount of time. Really hoping to fix the cause of the problem instead of just treating the symptom.0 -
One of my Friend's website Domain Authority is Reducing? What could be the reason?
Hello Guys, One of my friend's website domain authority is decreasing since they have moved their domain from HTTP to https.
Intermediate & Advanced SEO | | Max_
There is another problem that his blog is on subfolder with HTTP.
So, can you guys please tell me how to fix this issue and also it's losing some of the rankings like 2-5 positions down. Here is website URL: myfitfuel.in/
here is the blog URL: myfitfuel.in/mffblog/0 -
Domain name suffix impact on SEO
Hello there, We are about to launch a new website and were wondering what impact a specific suffix would have from an SEO point of view. We were thinking about going for a domain which ends in .london as oppose to .com We are based in London and sell world wide via our website. We are suggesting www.domain.london as oppose to www.domain.com I would appreciate your views... Thanks
Intermediate & Advanced SEO | | roberthseo0 -
Do UTM URL parameters hurt SEO backlink value?
Does www.example.com and www.example.com/?utm_source=Google&utm_medium=Press+Release&utm_campaign=Google have the same SEO backlink value? I would assume that Google knows the difference.
Intermediate & Advanced SEO | | mkhGT0 -
Include Cross Domain Canonical URL's in Sitemap - Yes or No?
I have several sites that have cross domain canonical tags setup on similar pages. I am unsure if these pages that are canonicalized to a different domain should be included in the sitemap. My first thought is no, because I should only include pages in the sitemap that I want indexed. On the other hand, if I include ALL pages on my site in the sitemap, once Google gets to a page that has a cross domain canonical tag, I'm assuming it will just note that and determine if the canonicalized page is the better version. I have yet to see any errors in GWT about this. I have seen errors where I included a 301 redirect in my sitemap file. I suspect its ok, but to me, it seems that Google would rather not find these URL's in a sitemap, have to crawl them time and time again to determine if they are the best page, even though I'm indicating that this page has a similar page that I'd rather have indexed.
Intermediate & Advanced SEO | | WEB-IRS0 -
Subdomains and SEO - Should we redirect to subfolder?
A new client has mainsite.com and a large numer of city specific sub domains i.e. albany.mainsite.com. I think that these subdomains would actually work better as subfolders i.e mainsite.com/albany rather than albany.mainsite.com. The majority of links on the subdomains link to the main site anyway i.e. mainsite.com/contactus rather than albany.mainsite.com/contactus. Having mostly main domain links on a subdomain doesnt seem like clever link architecture to me and maybe even spammy. Im not overly familiar with redirecting subdomains to subfolders. If we go the route of 301'ing subdomains to subfolders any advice/warnings?
Intermediate & Advanced SEO | | AndyMacLean0 -
Any way to find which domains are 301 redirected to competitors' websites?
By looking at the work from an SEO collegue it became clear that his weak linkbuilding graph probably is not the cause for his good rankings for a pretty competitive keyword. (also no social mentions where found) I was wondering what it could be, site structure and other on page optimization factors seems to be ok and I don't think there will be exceptionally good or bad user behavior... Finally I looked at the competitors and found that they have more links, better content en better design, so I got a little stuck. The only reason I can think of is that he is doing 301 redirects (or is rel=canonical tags). Is there a way to trace these redirects back to the source in order to include this important variable in your competitor research? thnx
Intermediate & Advanced SEO | | djingel10